EP0315999A3 - Method for reproducible mould filling with moulding materials - Google Patents

Method for reproducible mould filling with moulding materials Download PDF

Info

Publication number
EP0315999A3
EP0315999A3 EP88118783A EP88118783A EP0315999A3 EP 0315999 A3 EP0315999 A3 EP 0315999A3 EP 88118783 A EP88118783 A EP 88118783A EP 88118783 A EP88118783 A EP 88118783A EP 0315999 A3 EP0315999 A3 EP 0315999A3
Authority
EP
European Patent Office
Prior art keywords
mould
filling
moulding
case
crosslinking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88118783A
Other languages
German (de)
Other versions
EP0315999A2 (en
EP0315999B1 (en
Inventor
Gunther Dipl.-Ing. Fischbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VER FOERDERUNG KUNSTSTOFF
Original Assignee
VER FOERDERUNG KUNSTSTOFF
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VER FOERDERUNG KUNSTSTOFF filed Critical VER FOERDERUNG KUNSTSTOFF
Priority to AT88118783T priority Critical patent/ATE88667T1/en
Publication of EP0315999A2 publication Critical patent/EP0315999A2/en
Publication of EP0315999A3 publication Critical patent/EP0315999A3/en
Application granted granted Critical
Publication of EP0315999B1 publication Critical patent/EP0315999B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Abstract

In the production of mouldings from crosslinking moulding materials, in particular by the injection-moulding process, reproducible filling of the mould is problematical. Overfilling, with the consequence of flash formation, or underfilling, with the consequence that rejects are produced, frequently take place. In the case of the method proposed, the degree of mould filling is controlled with the aid of the pressures measured in the mould. The method makes use of the fact that crosslinking moulding materials are generally introduced into a mould which is of a higher temperature than the moulding material. After filling the mould, the moulding material is heated up in order to start the crosslinking reactions. The heating up causes a volume expansion. If the mould is completely filled, the expansion is prevented and a pressure increase occurs. If the mould is underfilled, expansion completely or partially takes place. The pressure increase is then less or there is no pressure increase. With suitable boundary conditions, these pressure signals characterise the mould filling level. The method provides mould filling control which acts from shot to shot. The reference variable for the control loop is the mould cavity pressure. The correcting variable for the control is, in the case of injection moulding, the metering stroke. In the case of other processes, the metering weight or the metering volume may be used. <IMAGE>
EP88118783A 1987-11-11 1988-11-11 Method for reproducible mould filling with moulding materials Expired - Lifetime EP0315999B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88118783T ATE88667T1 (en) 1987-11-11 1988-11-11 PROCESS FOR REPRODUCIBLE TOOL FILLING WITH MOLDING COMPOUNDS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3738248 1987-11-11
DE19873738248 DE3738248A1 (en) 1987-11-11 1987-11-11 METHOD FOR REPRODUCIBLE TOOL FILLING WITH REACTIVE MOLDS

Publications (3)

Publication Number Publication Date
EP0315999A2 EP0315999A2 (en) 1989-05-17
EP0315999A3 true EP0315999A3 (en) 1990-05-09
EP0315999B1 EP0315999B1 (en) 1993-04-28

Family

ID=6340254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88118783A Expired - Lifetime EP0315999B1 (en) 1987-11-11 1988-11-11 Method for reproducible mould filling with moulding materials

Country Status (3)

Country Link
EP (1) EP0315999B1 (en)
AT (1) ATE88667T1 (en)
DE (2) DE3738248A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140392C2 (en) * 1991-12-07 1997-02-20 Bosch Gmbh Robert Process for controlling an injection molding process
DE102005015491B4 (en) * 2005-04-05 2006-12-07 Battenfeld Gmbh injection molding
EP3974149A1 (en) 2017-06-15 2022-03-30 iMFLUX Inc. Injection molding of crosslinking polymers
CA3065817A1 (en) * 2017-06-15 2018-12-20 iMFLUX Inc. Injection molding of crosslinking polymers
EP3642001B1 (en) 2017-06-21 2022-12-14 iMFLUX Inc. Injection molding of crosslinking polymers using strain data
DE102022206727A1 (en) * 2022-06-30 2024-01-04 Baden-Württemberg Stiftung Ggmbh Method and device for process monitoring during the production of a finished part from a hot-curing material in a primary molding process

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2127465A1 (en) * 1971-06-03 1972-12-14 Hengstler Kg Measuring and control device on injection molding machines
US3792134A (en) * 1969-07-15 1974-02-12 Litton Industrial Products Method for monitoring product quality in a plastics injection-molding machine
US3840312A (en) * 1973-04-11 1974-10-08 Control Process Inc Dynamic pressure control system
FR2228600A1 (en) * 1973-05-10 1974-12-06 Cincinnati Milacron Inc
US3859400A (en) * 1974-01-11 1975-01-07 Cincinnati Milacron Inc Method for injection molding machine automatic control
US3977255A (en) * 1975-08-18 1976-08-31 Control Process, Incorporated Evaluating pressure profile of material flowing to mold cavity
US4222725A (en) * 1978-02-27 1980-09-16 Solid Controls, Inc. Electro-hydraulic ram control apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57142337A (en) * 1981-02-28 1982-09-03 Asahi Chem Ind Co Ltd Method and apparatus for automatically controlling injection molding

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792134A (en) * 1969-07-15 1974-02-12 Litton Industrial Products Method for monitoring product quality in a plastics injection-molding machine
DE2127465A1 (en) * 1971-06-03 1972-12-14 Hengstler Kg Measuring and control device on injection molding machines
DE2325568A1 (en) * 1971-06-03 1974-12-05 Hengstler Kg Injection moulding machine measuring and control device - incorporates a pressure indicator in the mould acting on hydraulic regulators
US3840312A (en) * 1973-04-11 1974-10-08 Control Process Inc Dynamic pressure control system
FR2228600A1 (en) * 1973-05-10 1974-12-06 Cincinnati Milacron Inc
US3859400A (en) * 1974-01-11 1975-01-07 Cincinnati Milacron Inc Method for injection molding machine automatic control
US3977255A (en) * 1975-08-18 1976-08-31 Control Process, Incorporated Evaluating pressure profile of material flowing to mold cavity
US4222725A (en) * 1978-02-27 1980-09-16 Solid Controls, Inc. Electro-hydraulic ram control apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 6, Nr. 26 (M-176)[1124], 4. Dezember 1982; & JP-A-57 142 337 (ASAHI KASEI) 03-09-1982 *

Also Published As

Publication number Publication date
DE3880627D1 (en) 1993-06-03
DE3738248A1 (en) 1988-04-28
EP0315999A2 (en) 1989-05-17
DE3738248C2 (en) 1991-05-23
ATE88667T1 (en) 1993-05-15
EP0315999B1 (en) 1993-04-28

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